The Mallory Hyfire VI, model 685, has programable settings built into the box.
10 modes to control rev limits, activate additional equipment, test the tach, etc.
One setting will let you retard the ignition at very low RPM (starting the engine is easier)
Another setting sets how many degrees are retarded for each pound of boost. You have to have their MAP sensor. A 2 BAR or 3 Bar is available.

I've got 9 degrees of retard on start.

The 1 degree per pound was posted somewhere else but can be changed easily by scrolling though the modes and then pressing up/down arrows.

I've also just read through my Edelbrock PDF and I'll get around to some adjustments later.

The car, a '74 Charger, isn't ready for the engine yet so I have time to play.

Roy